Improvement in earth-augers



UNITED STATES PATENT OFFICE.

FREDERICK A. BARLOW, OF VICTOR, IOWA.

IMPROVEMENT IN EARTH-AUGERS.

Specification forming part of Letters Patent No. 146,635, dated January20, 1874` application filed July 5, 1813.

To all whom it may concern:

Be it known that I, F. A. BARLOW, of Victor, in the county of Iowa andState of Iowa, have invented a new and Improved llarth-Auger, and I dohereby declare that the following is, a full and exact description ofthesame, reference being had to the ac- Vof earth-borers formed of a hollowiianged cylinder or case, into which the loosened earth is received asthe boring proceeds, and by which it is elevated and discharged. Thespecilic improvement consists in eonstructin g the cylinder withvertical grooves exteriorly to allow the downward passage of air duringthe boring operation, and in making the body'of cylinder separate fromthe bottom and frame thereof, and connecting them by means hereinalterdescribed.

The bottom A of the auger is formed, like its body` B, of sheet metal orboiler-plate iron, and has a vertical upward-projecting flange, C,extending around it. A sectorshaped piece is cut out of said bottom toform a valve, D, which is hinged at E, and opens inward. When closed, asshown in dotted lines, Fig. l, and full lines, Fig. 2, the free end ofthe valve rests on the edge B opposite the hinge E. Said edge isinclined downward to form a lip or cutting-edge, which, as the augerrevolves, takes into the earth, operating thus after the manner of thelips of ordinary woodangers. A series of vertical bars, I, are attachedto the iiange C, on one half or side thereof, at suitable distancesapart. These bars "are joined at the top to a half-ring, I', with whichthe shaft L is also connected by bars K. The parts I I constitute theframe of the auger. The shell or cylinder proper is 'formed of twoparts, B B, the latter hinged snugly against them, and thus prevent theshell or cylinder from moving circularly. The part B fits between theiiange G and the bars I at the bottom, and under a movable ring, M, atthe top. Said ring conforms to the ring l in shape, and has elongatedslots, which allow it vertical movement on bolts J, that pass through,and-project exteriorly from, the ring I. The ring M is forced down overthe top edge of the part B when the latter is in place.

` '.lhus secured, the cylinder can move neither vertically norcircularly, and yet may be readily removed, as required.

The main function ofthe grooves in the cylinder is to allow free passageof air, which is a necessity in operating the auger, particularly inmoist or clayey earth. The cylinder is likewise strengthened by thecorrugations, and friction reduced.

What I claim as `new is- 1. The earth-auger having vertical grooves inits shell or cylinder for conducting air during the operation of boring,substantially as shown and described.

2. The combination of the shell B with the bars I, the same beingcorrugated or grooved and iitted together, as specified.

3. The combination of the grooved shell B with the bars I, bottom A C,and slotted movable ring M, as shown and described.

FREDERICK A. BARLOW. Witnesses:

GEO. W. RUTHERFORD,

IsA. S. RICHARDS,

LEONARD DEvoRE,

HENRY S. BARNES.

